Switching device.



W. T. BOOTH.

SWITCHING DEVICE.

APPLICATION FILED DEC.30. I916.

Patented July 2, 1918.

//1 ve firm r W/W/mm f 0 0 7/7 WILLIAM T. BOOTH, OF EAST ORANGE, NEW JERSEY, ASSIGNOR TO "WESTERN ELECTRIC; COMPANY, INCORPORATED, OF NEW YORK, N. '55., A GQBPQHATTQIN 0F NEW YORK.

SWITCHING DEVICE.

Specification of Letters Patent.

Patented duly This...

Application filed December 30, 1916. Serial No. 139,805.

To all whom it may concern:

Be it known that T, WILLIAM T. BOOTH, a citizen of the United States, residing at East Orange, in the county of Essex and State of New. Jersey, have invented certain new and useful Improvements in Switching Devices, of which the following is a full, clear,concise, and exact description.

This invention relates to a-hook switch especially adapted for use in subscribers sets and its object is to provide a simple and compact device which will be eflicient in operation, cheap to manufacture, and which may be used indiscriminately in different types of sets. 7

There are two general types of so-called wall sets in common use at a subscriber's station, a non-flush type which is adapted for mounting directly on the wall, and a flush type which is arranged to be set into the wall with which the front of the set is practically flush. In the former type it is the usual practice to have the lever of the hook switch project through a perforation in the side wall of the set, while in the latter it is necessary that this lever project through the front of the set. Tn case the hook switch is arranged for mounting directly to the side wall or front of the set, it may be possible to use the same hook switch in either type of set, but in many subscribers sets, particularly those adapted for interoommunicating service, it often becomes desirable to assemble various parts of the apparatus, including the hook switch, upon a mounting plate, which is later mounted within the subscribers set casing. With this construction and the present type of hook switches itbecomes necessary to supply hook switches of difl'erent design for the diderent sets, making impossible the interchangeability of assembled units and thereby making it necessary to carry a greater variety of parts in stock.

Tn order to overcome the necessity for providing separate hook switches for flush and non-flush type sets this invention provides a hook switch of such a construction that it may be used equally satisfactorily with either type.

This invention may be more clearly understood by reference to the accompanying drawings, in which Figure 1 is a front elevation of the containing case of a subscribers telephone set of a no -fl h yr q p with a hook switch embodying this inven tion and arranged in this instance so that the lever projects through the side of the case; Fig. 2 is an enlarged view showing a section of the apparatus mounting plate with a hook switch mounted for use in a nonflush set so that the lever extends through the side .of the set as in Fig. 1; Fig. 3 is a front elevation of the containing case of a subscribers set of the flush type equipped with a hook switch in accordance with this lnvention; and Fig. 4, shows a section of the apparatus mounting plate with the hook switch mounted for use in a flush type set 1n such a way that the lever projects through the front of the case.

The same reference figures are used to designate the same parts wherever shown.

The switch lever 4, having an operating end 5 and a hook end 6 adapted to hold the receiver, is pivotally mounted to the bracket 7 by means of the pivot screw 8 and the shouldered bushing 9. Upon a bent-up extension 10 of the bracket 7 are mounted the customary springs 11, which are separated from each other by means of insulating separators 12, and are held to the bracket by means of the screws 13. The extended portion 5 of the switch lever 4- bears against an insulating strip 14- of fiber or similar material, fastened to the middle spring, and operates the contacts in the well-known manner. The body of the bracket is provided at either end with threaded mounting holes ].5-15, and similar threaded holes 16-16 are provided in the lugs 17 bent up at right angles to the body of the bracket. The distance between the holes l5-15 is the same as be tween the holes 1616 and is equal to the dis tance between corresponding holes in the apparatus mounting plate 18. The hook switch is mounted to the apparatus mounting plate by means of mounting screws 19, the threaded portions of which pass through clearance holes in the apparatus mounting plate, and engage the threaded holes 15-15 or 16-16, depending upon whether it is desired to use the unit with a non-flush or a flush type set. In Fig. 2 the mounting screws are shown engaging holes 1515, this arrangement being the one provided for a non-flush type set in which the hook lever projects through the side of the set. Tn Fig. 3 the mounting screws are shown engaging the holes 1616, giving the arrangement desired for a flush type set in which the hook lever projects through the front of the set. In the latter position the hook switch is rotated ninety degrees from its former position, clearance for the lever being provided by the recessed portions of the apparatus mounting plate.

Although a hook switch of this construc tion is particularly desirable for use in connection with a mounting plate, as shown, it is not limited to use with a detachable mounting plate but is equally desirable in those cases where the hook switch is to be mounted directly on the casing of the set.

What is claimed is:

1. In switching device, a mounting plate, a bracket having a flat main portion and a plurality of angular extensions thereto, a plurality of circuit controlling members mounted on one of said extensions, an actuating member mounted on said main portion and in operative relation to said circuit controlling members, means on said main portion for mounting the device in a position whereby the actuating member is in a plane parallel withthe plane of said mounting plate, and corresponding means on one of said angular extensions for mounting the device in a position whereby the actuating member is in a plane perpendicular to the plane of said mounting plate.

2. In a switching device, a mounting plate, a bracket comprising a fiat main portion and a plurality of angular extensions, a plurality of contact springs mounted upon one of the angular extensions, an actuating member pivotally mounted upon the main portion of the bracket in operative relation to the free ends of the contact springs, and means corresponding with openings provided in the main portion and the other angular extensions for mounting the bracket on the mounting plate with the actuating arm in a plane parallel with or at an angle to the plane of the mounting plate.

In witness whereof, I hereunto subscribe my name this 29th day of December A l)., 1916.

' WILLIAM T. BOOTH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patent.

Washington, D, 0.. 

